Jepson eFlora
Key to families | Table of families and genera

Key to Medicago

View taxon page for Medicago

1. Fruit 1-seeded, reniform, not prickly, black; flower 2–3 mm ..... M. lupulina

1' Fruit 1- to several-seeded, spirally coiled (or straight to sickle-shaped), prickly or not, tan or gray to black; flower 2–11 mm

2. Perennial herb, generally erect; corolla 6–11 mm, violet or violet- to yellow-green (yellow); fruit not prickly ..... M. sativa

2' Annual, generally prostrate, decumbent, or low; corolla generally 2–7 mm, yellow to orange-yellow; fruit prickly or not

3. Fruit not prickly, ± 1–1.5 cm wide ..... [M. scutellata]

3a. Stipules generally divided ± to base into a cluster of bristles ..... [M. orbicularis]

3a' Stipules dentate ..... [M. scutellata]

3' Fruit generally prickly, < 1 cm wide

4. Stipules generally entire to ± dentate; plant hairs generally dense

5. Leaves densely hairy; fruit sparsely hairy ..... M. minima

5' Leaves, fruit hairy, often glandular-hairy (or fruit glabrous) ..... M. rigidula

4' Stipules deeply toothed or cut; plant hairs generally ± 0 to sparse (strigose in M. praecox)

6. Leaflet generally with dark central spot, obovate to obcordate, length ± = or 1–2 × width; leaf pinnate or subpalmate; stipules generally cut 1/4–1/2 width

7. Leaflet generally obcordate, length ± = width; leaf pinnate or ± palmate; fruit a loose spiral, glabrous ..... M. arabica

7' Leaflet obovate (obcordate), length 1–2 × width; leaf pinnate; fruit generally a tight spiral, sparsely (densely) hairy ..... M. truncatula

6' Leaflet without dark central spot, generally wedge-shaped or obovate to obcordate, length 1–2 × width; leaf pinnate; stipules generally cut ± >= 1/2 width

8. Leaflet generally 10–20 mm, generally glabrous; corolla 3.5–6 mm; California Floristic Province; common ..... M. polymorpha

8' Leaflet 3–10 mm, generally strigose; corolla 2.5–4 mm; Inner North Coast Ranges, Cascade Range Foothills, Sierra Nevada, San Francisco Bay Area, South Coast; uncommon ..... M. praecox

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Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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